The Siemens SENTRON 5SY7616-7CC is a 4-pole miniature circuit breaker (3P+N) with a C-curve tripping characteristic, rated 16 A at 400 V AC. It breaks up to 25 kA per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No. 235 — the IEC figure governs European panel coordination; the UL figure tells you it passes North American branch-circuit recognition for export builds or dual-rated machines.
At 25 kA (IEC 60947-2) this MCB sits in the high-breaking-capacity tier for a 16 A frame — enough for most secondary distribution boards with a transformer upstream. The 5 kA UL 1077 figure is a supplementary-protector rating, not a full branch-circuit rating per UL 489; if your BOM calls for a UL 489 listed breaker, this part won't satisfy that requirement. The 440 V multi-phase rating covers 3-phase line-to-line faults on a 400 V system with margin.
Occupies 4 width units (72 mm,) at 70 mm installation depth. Neutral conductor switching is integrated — no separate neutral link needed in the 3P+N configuration. IP20 with connected conductors; sealable for panel-lockout tagging. Mounting position any.
Environmental and service life
Rated for -40 °C to 75 °C ambient. Mechanical service life 10 000 switching cycles typical. Overvoltage category III suits fixed-installation distribution boards.